code: def __call__(self, request: Request) -> StreamingResponse:
      gen = self.generate_forever()
      return StreamingResponse(
          gen, status_code=200, media_type="text/plain"
      )
  
file_path: ray/doc/source/serve/doc_code/http_guide/streaming_example.py
imports: import time
  from typing import Generator
  import requests
  from starlette.responses import StreamingResponse
  from starlette.requests import Request
  from ray import serve
  import asyncio
  import time
  from typing import AsyncGenerator
  import requests
  from starlette.responses import StreamingResponse
  from starlette.requests import Request
  from ray import serve
label_desc: Use image node_id 1 for calling the StreamingResponder obj's underlying member method code with example usage: obj.__call__(request) and returns: StreamingResponse